tools: complain about devices that don't have abs x/y axes in the edge detector

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

diff --git a/tools/touchpad-edge-detector.c b/tools/touchpad-edge-detector.c
index e5420cf69149af3407ca781050ce4900d1fdaed3..fdc496e5f6656d994d06e06b822124213a174c59 100644 (file)
--- a/tools/touchpad-edge-detector.c
+++ b/tools/touchpad-edge-detector.c
@@ -169,6 +169,13 @@ int main (int argc, char **argv) {
        }
        libevdev_grab(dev, LIBEVDEV_UNGRAB);
 
+       if (!libevdev_has_event_code(dev, EV_ABS, ABS_X) ||
+           !libevdev_has_event_code(dev, EV_ABS, ABS_Y)) {
+               fprintf(stderr, "Error: this device does not have abs axes\n");
+               rc = EXIT_FAILURE;
+               goto out;
+       }
+
        dim.left = INT_MAX;
        dim.right = INT_MIN;
        dim.top = INT_MAX;
@@ -188,6 +195,7 @@ int main (int argc, char **argv) {
 
        printf("\n");
 
+out:
        libevdev_free(dev);
        close(fd);